Fractional-spacing device for type-writing machines.



A. A. SCHWARTZ.

FRACTION/IL SPACING DEVICE FOR TYPE WRITING MACHINES.

I APPLICATION FILED MAY 3,1915. l,189,74c3.

Patented July, 1916.

III I/ENTOR W M fl w WM WITNESSES.- W4

V. M R m T! A..

- novel mechanism for the minute or extensive.

' a shaft 21.

ALBERT A. SCHWARTZ OF NEW YORK, N. Y., ASSIGNOR TO ROYAL TYPE'WRITEB,COMPANY, INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

FRAOTIONAL-SPACING DEVICE FOR TYPE-WRITING MACHINES.-

To (ZZZ whom it may concern Be it known that LALnnnrr A. Somvinrrz, .acitizen of the United States of Ameripa, residing in the borough of theBronx, city of New York, county of-Bronx, State of New York, haveinvented a certain new anduseful Fractional-Spacing Device for Type-VVriting .Machines, of which the following is a specification.

This invention relates to the line spacing of typewriting machines andconsists in rotation of the platen operated independently of theordinary line-spacing niechanism.

The accompanying drawings illustrate the invention and the cooperatingparts of a typewriting machine.

Figure l is a longitudinal view of a platen supported in the end framesof a carriage, showing the fractional spacing device in section: Fig. 2;a-transverse view taken on line 2, *2, Fig 1, on an enlarged scale: Fig.3, aperspective View of the cylindrical ma nipulating part of thedevice: Fig; l, a side elevation of the supporting sle-we and attachedparts: Fig 5, shows the spacing washer: and Fig. (3, the outer collar.

The platen 7, its shaft 8, carriage end frames 9, turning knobs 10-,ratchet wheel 11 and detent roller 12 are of ordinary con struction.

A. plate 13, secured to the end of the platen, is by a clutch toothconnected to the worm wheel 14. having a reduced portion or hub 15 andbored. to it on the shaft 8. This hub 15 seats in a recess in asleeve 16whose outer end. is bored to fit on shaft 8 and is provided with a setscrew 17 by which the sleeve is securely fastened to the shaft 8. On theinner end of the sleeve is a flange 18 on which are bearing projections19, between which is a worm 20 located to engage the worm wheel 1+l,said worm being held in place between the projections 19 by At the outerside of one of the projections is a disk or wheel 2-2 having angularlyarranged'teeth and secured to the worm 20. The cylindrical manipulatingpart 23 surrounds the worm wheel 14, worm 20 and toothed wheel 22, andis provided with a platevor internal flange 24 having a bearing on'ashonldervon the sleeve adjacent the'fiange 18 and between the plate 2-and the frame of the carriage is a spacing Specification of LettersPatent.

washer 25. This washer has a p'art'of its opening straight (as shown at26, Fig. 5,) to cause it to rotate with the sleeve 18. Formed in theinner periphery of the manipulating part 23 is a screwQT which ispreferably imilti-threaded, the threads of which mesh snugly in theteeth of the wheel 22 whereby slight rotary movements of the PatentedJuly 4, 1916.

Application filed May 8, 1915. Serial No. 25,430.

cylindrical part23 will impart movement of the platen on the shaft 8,which is held sta tionary by theratchet 11 and detcnt roller 12. Theouter periphery of the part 23 knurled to facilitate handling the same.Practice has demonstrated that twelve is a suitable number of threads inthe screw 27 to provide adequate adjustment of the platen, and thisadjustment of the platen may be made at any time, irrespective of theother platen controlling means, for setting the line of print anywherebetween the usual spaced lines, or resetting an ordinary spaced lineexactly to the line of planting, and also enables the platen to beproperly set in filling in the blanks of forms, etc.

As stated the adjusting part 23 may have twelve threads 27 to provide asuitable thread-pitch action on the wheel This number of threads may bevaried. For instance, a less number may be used and the pitch of threadof worm 20 increased or it may be made a double thread or otherwisemultiplied to provide the necessary or required ratio of action betweenthe manipulilting piece 23 and the platen.

1 claim:

1.. A fractional line spacing device for typewriting machines,comprising a cylindrical manipulating part having" a screw formed on itsinterior periphery. a toothed wheel having a bearin; on a sleeve securedto the platen shaft and meshing in the internal thread of themanipulating part and a gear connection between said toothed wheel andthe platen.

2. A fractional line spacing device for typewritingi machines,comprising a cylindrical nmnipulating, part having-a multithread screwformed on its interior periphery, a toothed wheelhavinga bearing on asleeve-secured to the platen slm'fti'and meshing in the internal threadof the manipulatingpart and a gear connection between said toothed wheeland the platen.

3. A fractional line spacing device for typewriting machines, comprisinga cylindrical manipulating part having a screw 7 formed on its interiorperiphery, a toothed wheel having'a bearing on'a'sleeve secured to theplaten shaft and'meshing in the in-' ternal thread of the manipulatingpart, a Worm Wheel having a hub seated in a recess in the sleeve, aworm. connected to the toothed wheel and a clutch connection between theworm wheel and the end of; the

platen; 4 a 4. A fractional :line spacing .device fol; typewritingmachines, comprising a cylindrical manipulating part havinga Inultithread screw formed on its interior periphery, a' toothed wheel having abearing on a j sleeve securedto the platen shaft and meshing in theinternal thread of the manipula t-v formed on its interior periphery anda flange at one side, a sleeve secured to the platen shaft and having abearing in an end frame of the carriage and aflange at its inner endprovided with beariiig projections, a worm located between and; carriedby said projections, a toothed wheel secured to one end of the WOIIH andmeshing into the internal screw thread of the manipulating and the endof the v part,va Worm wheel into which the worm meshes and having a hubseated in a recess I of the sleeve,'a clutch e'onnect'ion between theworm wheel and the end of the platen, .the flange of the manipulatingpart having a bearing on the sleeve adjacent its flange.

6. A fractional line spacing device [for typewriting machines,comprising a cylin-fl .drical manipulating" part having a'screw formedon its interior periphery and a flange at one side, a sleeve secured to.the

platen shaft and "having abearing in an a orm ,locatedbetween andcarried by said projections a toothed Wheelsecured to one .end oftheWorm 'and 'meshing into the in- .ternal screw thread of the manipulatingpart, a Worm wheel into which the worln meshesand having a hub seated ina-recess of the sleeve, a clutch connection, between the worm wheel andthe end of the platen,

a bearing on the sleeve adjacent its flange, a spacing-Washer betweenthe flange of the manipulating part and the carriage frame .end frame ofthe carriage and aflange at its nner end provided wlt-hbearing proectlons, I

,the flange of the manipulating part having 5 and a collar on'the outerend of the sleeve.

In testimony whereof, I have hereunto subscribed my name. ALBERTA.SCHWARTZ Witnesses:

Gnonon F. HANDLEY, L. A, MEYERS.

